CN102671276A - Intelligent awakening system based on electroencephalogram signal - Google Patents
Intelligent awakening system based on electroencephalogram signal Download PDFInfo
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- CN102671276A CN102671276A CN2012101859583A CN201210185958A CN102671276A CN 102671276 A CN102671276 A CN 102671276A CN 2012101859583 A CN2012101859583 A CN 2012101859583A CN 201210185958 A CN201210185958 A CN 201210185958A CN 102671276 A CN102671276 A CN 102671276A
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Abstract
The invention provides an intelligent awakening system based on an electroencephalogram signal. The intelligent awakening system can acquire electroencephalogram changes of a sleeper in real time and monitor sleeping progress of a user by analyzing changes of rhythm wave energy ratio in the electroencephalogram signal, duly awaken the sleeper and accordingly enable the sleeper to recover physical strength and vitality in a short time. The system comprises an electroencephalogram signal acquiring module, an electroencephalogram signal processing module and a sleep awakening module. The signal acquiring module records the electroencephalogram signal of the sleeper through an electrode stuck nearby the forehead of the scalp and transmits the acquired electroencephalogram signal to the signal processing module. The signal processing module performs energy analysis of rhythm waves of electroencephalogram signal data and monitors the sleeping progress through the changes of the electroencephalogram rhythm waves. When the sleeper in a best awakening state is detected, the signal processing module transmits an awakening instruction to the awakening module in a wireless transmission mode. After the awakening module receives the awakening instruction, the awakening module starts an alarm or a vibration device to awaken the sleeper.
Description
Technical field
The present invention designs a kind of based on brain electricity (EEG, Electroencephalography) the intelligent waken system of signal.Specifically refer to; Energy variation through each species rhythm ripple in the brain electricity of real time record and analysis user; System can the supervisory user brain sleep quality and resting state; Return to the best moment user's spirit and physical the rest, wake the sleeper who is under the specific sleep state automatically up through sleep.The combination that the invention belongs to cognitive neuroscience field and areas of information technology is used.
Background technology
Sleep is self-evident to the influence of people's the healthy and mental status.The people that sleep quality is high, not only can effectively alleviate tired out, and can be fast with the fuller new darg of mental status input.Be one of essential condition of high-quality sleep the wherein suitable length of one's sleep.Good sleep should be suitably and reasonably, is not that time of sleeping is long more, and the sleep quality of acquisition is just high more.In fact, long sleep not only causes waste of time, runs counter to desire toward the contact meeting.Discover, the length of one's sleep long with do not have enough sleep equally, can cause all that Mental fatigue, body are tired, metabolic rate reduces.And for a long time after the sleep, beating of heart just can be slowed down, and oxygen content reduces in the blood, and the metabolism rate also can be fallen very lowly, and muscular tissue relaxes, in the course of time, and people will become lazy, weakness, even intelligence also can descend thereupon.So, to everyone state, monitor its sleep state, wake the raising of the quality that conduces to sleep up in its spirit and the moment that physical recovery reaches the best.
At present, the assisting sleep product of a great variety that also occurs on the market, its function concentrates on mostly and how to help the user sleeping fast; In the sleep awakening system, mainly be the mode that adopts electronic alarm clock, timing wake-up sleeper seldom has product to be devoted to the scientifically sleep state of analysis user, in time wakes the sleeper up.But the unified standard of the neither one length of one's sleep that user's spirit and antisecosis need.The survey showed that for present science: the crowd of all ages and classes section has very big-difference the suitable length of one's sleep.For example, should be nine to 12 hours the length of one's sleep of minor every day of five years old to 18 years old; And the adult should sleep seven to eight hours, was no less than six hours; 60 to 70 years old people should be no less than nine hours.Similar these survey datas, the people who has provided all ages and classes section in the ordinary course of things, the length of one's sleep that every day is roughly suitable.Yet the just whole situation of these data reactions; Specific to everyone distinctive biological clock and sleep environment, health etc.; User's sleep quality can there were significant differences, wants to reach muscle power and energy recovery preferably, is difficult to the length of one's sleep that needs set in advance.Therefore, present timing wake-up modes such as electronic alarm clock just can not adapt to the current sleep state of user well in application.
In order to solve this problem of confirming of wakeup time, the present invention has designed intelligent waken system by means of the record and the analysis of brain wave.Inseparable relation between the process that basis of the present invention is to sleep and the brain wave rhythm and pace of moving things ripple.Dormant EEG research shows: once sleep is the repetition of several sleep cycles in fact, and each sleep cycle comprises former and later two stages, i.e. S sleep stage and paradoxical sleep stage.The S sleep stage is claimed NREM sleep again; Major function is to regain one's strength; Height frequency compounding in this stage brain electricity, and be main with low-frequency theta rhythm wave component (4～7 hertz), research shows that this moment, the energy of theta rhythm ripple accounted for more than 50% of brain wave gross energy.The paradoxical sleep stage is claimed rapid-eye-movement sleep (REM sleep) again, is mainly used in to recover mental, and the high beta response ripple (20～30 hertz) in this stage brain electricity more than 20 hertz accounts for brain wave gross energy ratio and significantly rises, but the shared concrete ratio of high beta response wave energy is uncertain.
Though by the complete sleep cycle that S sleep stage and paradoxical sleep stage are formed, time span is unfixing, the periodicity of sleep still can embody from the alternate of the brain wave rhythm wave energy ratio the whole sleep procedure.Research on the psychology shows that for the sleeper, ideal waking up should occur in the 4th all end of term.But the time span of different people's sleep cycles all is different; Even same individual, under different age brackets and different physiological status, the time span of its each sleep cycle also is not quite similar.The method that traditional alarm clock wakes up is difficult to confirm best wakeup time point (the 4th all end of term) in advance and wake the sleeper up.Yet,, gather in real time and analytical equipment by the brain electricity from the angle of brain electricity analytical; We are the sleeping process of supervisory user in real time; And the wakeup time point of identification the best automatically: promptly in the whole process of sleep, the brain electricity is kept watch on, the paradoxical sleep stage that detects the sleeper when the 5th time finishes, and beginning gets into S sleep during the stage once more; Can confirm that the 4th cycle finish, be best waking up constantly this moment.
Summary of the invention
Intelligent waken system provided by the invention can be monitored sleeper's brain electricity in real time and change; Change through analyzing brain electricity particular rhythm ripple; Ending in the 4th cycle of sleep procedure wakes the sleeper up, thereby makes the sleeper in the shortest time, and muscle power all obtains ideal recovery with energy.
This intelligent waken system comprises eeg signal acquisition, EEG Processing and three modules of sleep awakening.
Wherein, The eeg signal acquisition module is through being distributed near the electrode the last forehead; The scalp voltage signal that electrode brings out as sensor record sleeper's cerebral activity, the voltage signal of sensing on the electrode is sent to signal processing module through after further nursing one's health.Signal processing module carries out real-time analysis to the eeg data that receives; Whenever the theta rhythm ripple and the shared ratio of high beta response ripple that detected in the brain electricity at a distance from 1 minute; And change with 4 minutes the brain wave rhythm ripple in front and to compare; Sleep state long time inner analysis user changes situation, gets rid of the influence of noise that possibly exist in the single detection.The paradoxical sleep stage that detects the sleeper at the 5th time finishes, and beginning gets into S sleep during the stage once more, and convenient the transmission to wake module with integrated radio transmission apparatus of signal processing module waken instruction up; Wake module is in real-time armed state always, when receive from signal processing module wake instruction up after, wake module starts Rouser the sleeper is waken up.The entire block diagram of system is as shown in Figure 1.For making the whole system operation mode more flexible, the connection of intermodule is more convenient, and signal processing module will use Wireless transmission mode that wake module is sent instruction among the present invention.Radio receiving transmitting module then uses one group of (each one of transmitting terminal and receiving terminal) high performance rf chip CC1100E design to accomplish.
Here need to prove that the present invention is intended to wake so new angle up from the science of sleep, designs a kind of novel waken system based on the brain electro-detection, is the planning length of one's sleep of sleeper's science.
Description of drawings
Fig. 1 is based on the entire block diagram of the intelligent waken system of EEG signals.
The wireless transceiver circuit that Fig. 2 is designed based on the CC1100E chip, chip operation is under the frequency of 470MHZ.
The drive circuit of Fig. 3 Rouser.
The specific embodiment
This system comprises following three modules, and its practical implementation is following:
Signal acquisition module: the main function of signal acquisition module is to write down sleeper's brain wave.Brain wave acquisition comprises the dried electrode of micropin formula, and signal conditioning circuit is formed.The brain wave acquisition module is gathered the faint voltage signal on sleeper's scalp through the electrode that is pasted on sleeper's forehead.The present invention uses the dried electrode of micropin formula.Dried electrode is for traditional wet electrode.Use wet electrode to gather brain, need on people's scalp, smear electrode cream, the purpose of smearing electrode cream is to reduce the cuticular ultra-high-impedance of scalp.And the dried electrode of micropin formula that we use can use the microneedle horny layer, eliminates the influence of horny layer high impedance, so need not smear electrode cream.Use the dried electrode of micropin formula not only convenient, and solved the sampling distortion problem that wet electrode causes owing to the electrode cream desiccation in long-time gatherer process.Signal acquisition module adopts the mode of unipolar lead to write down scalp brain electricity, and wherein reference electrode is placed on the ear-lobe rear portion, and the sampling electrode is placed on the forehead relevant with sleep state and is close to scalp.The voltage signal of the electrode record line that leads of the electrode through the band shielding subsequently gets into modulate circuit in the acquisition module and accomplishes signal and amplify, and preliminary treatment such as analog digital conversion.Pass through the direct entering signal processing module of analog-to-digital EEG signals at last.
Signal processing module: the major function of signal processing module is the sleep state of supervisory user, and when wake-up condition is set up, sends instruction through wireless base station apparatus to wake module.Signal processing module is accomplished two operations to the eeg data of gathering by embedded system: an operation is that real-time eeg data is cut apart, and is that unit carries out online cutting apart with eeg data with one minute; Another operation is that the eeg data in just split 1 minute is carried out the analysis of rhythm and pace of moving things wave energy, carries out the processing of next minute data after current data is finished dealing with again.The flow chart of data processing of each minute is following:
(1) this section eeg data carries out bandpass filtering, with high-frequency noises such as direct current in the filtering brain electricity and power frequency, frequency filtering 0.5-42 hertz.
(2) 1 minute eeg data after cutting apart carries out power Spectral Estimation, obtains the rhythm and pace of moving things wave power spectrum (frequency distribution of energy) of its EEG signals.
(3) calculated theta rhythm and pace of moving things ripple and the average energy of high beta response ripple in 1 minute are designated as l with theta rhythm ripple and high beta response wave energy ratio
k, preceding 1 minute energy ratio is l
K-1, preceding 2,3,4,5 minutes energy ratio is followed successively by l
K-2, l
K-3, l
K-4, l
K-5Here k is the natural number greater than 5, does not judge in preceding 5 minutes.
(4) the energy proportion Changing Pattern of calculated theta rhythm and pace of moving things ripple and high beta response is worked as l
k>=l
K-1, explain that the theta rhythm ripple is increasing, high beta response wave energy is reducing, sleep maybe be just from the paradoxical sleep stage to the S sleep transition stage, note d
k=1; Otherwise, sleep maybe be just from the S sleep stage to the paradoxical sleep transition stage, note d
k=0.
(5) confirm current which that is in sleep cycle of user in stage, if
Then showing has four theta rhythm ripples increasing in nearest 5 minutes, high beta response wave energy can be assert the current S sleep stage that is in reducing, and shows that a complete sleep cycle begins, note p
k=1; If
Then showing has four theta rhythm ripples reducing in nearest 5 minutes, high beta response wave energy can be assert the current paradoxical sleep stage that is in increasing, note p
k=0; Other situation can be thought and is in the critical state of S sleep and paradoxical sleep or do not get into sleep state, note p
k=0.
(6) detection of sleep cycle incipient stage confirms that what moment sleeper formally gets into the S sleep stage by paradoxical sleep once more, perhaps for the first time gets into the S sleep stage, and these all are the initial of a complete sleep cycles constantly.If p
k-p
K-1=1, show that a new sleep cycle begins, this moment, the sleep cycle enumerator added 1.
(7) wake confirming of the moment up; When the value of sleep cycle enumerator is added to 5; Signal processing module will will wake instruction up through wireless base station apparatus and send and wake module; The transmitting terminal circuit uses the wireless transceiver circuit based on the CC1100E chip design, and its operating frequency is 470MHZ, circuit diagram such as Fig. 2.
The sleep awakening module: the main effect of sleep awakening module is, through radio receiver, receives the instruction back of waking up that the sleep awakening module transmitted and starts the sleep awakening device.This module comprises two parts: the wireless receiving end that first is made up of CC1100E chip and its correspondent peripheral circuit; The same wireless transceiver circuit that uses based on the CC1100E design of receiving terminal circuit; Circuit diagram such as Fig. 2; The circuit configuration that is transmitting terminal and the employed CC1100E of receiving terminal is identical, and the receiving terminal circuit operating frequency is similarly 470MHZ; Second portion then is the drive circuit (circuit diagram such as Fig. 3) that can drive Rouser that receives CC1100E control, and drive circuit is made up of a triode amplifying circuit and a photoelectricity coupling circuit.Receive when wake module and to wake when instruction up that trigger CC1100E and export faint electric current simultaneously to GD02 port output high level, this electric current makes wake module work thereby can drive optocoupler components after amplifying through transistor amplifier.Need to prove that optic coupling element can not only use as gate-controlled switch, simultaneously entire circuit is played isolated effect, the Rouser when making work is unlikely to the wireless receiving of CC1100E is caused interference.
In the application of reality, system includes signal acquisition module, signal processing module and three part collaborative works of sleep awakening module.Signal acquisition module is imported the original EEG signals that collect into embedded system through attached to the record of the electrode on sleeper's scalp EEG signals.Embedded system is accomplished real-time brain electric treatment, and when beginning to use, the sleep cycle accumulator puts 0 automatically at every turn.When sleep cycle is added to 5; Promptly can know that the sleeper has reached competent sleep this moment; Embedded system will be sent a sleep awakening instruction to the sleep awakening module, and the sleep awakening module starts the sleep awakening device, like quarter-bell or vibrating device the sleeper is waken up.
Claims (3)
1. based on the intelligent waken system of EEG signals, this cover system is characterised in that, comprises signals collecting, signal processing and three modules of sleep awakening:
Described signal acquisition module, major function is for gathering sleeper's EEG signals, and wherein little formula is done attachment of electrodes near the scalp forehead, and adopts the mode of unipolar lead to write down the EEG signals on the scalp;
Described signal processing module, for running on the brain electric treatment journey on the embedded system, major function is for to carry out the analysis of rhythm and pace of moving things wave energy to primary EEG signals, the sleeping process of supervisory user;
Said wake module, major function do, through the mode of wireless receiving, the acknowledge(ment) signal processing module is sent wakes instruction up, and receive wake instruction up after, start quarter-bell and vibrating device the sleeper waken up.
2. intelligent waken system as claimed in claim 1, its signal processing module mainly are the analyses through the Changing Pattern of rhythm and pace of moving things wave energy in the EEG signals, detect the process of sleep, comprising:
(1) EEG signals cuts apart; Continuous EEG signals based on the sliding window technology are cut apart module, and sliding window length is 1 minute, 1 minute EEG signals in the sliding window; Form a basic signal processing object, the system that is to say is minute serving as every at a distance from detecting sleeping process;
(2) the real-time calculating of brain wave rhythm wave energy to 1 minute EEG signals in the front window, is calculated wherein theta rhythm (4-7Hz) and the energy proportion of high beta response (20-30Hz);
(3) the confirming of S sleep and paradoxical sleep stage in the sleep cycle through the variation tendency of theta rhythm in nearest 5 minutes with the energy proportion of high beta response, judged and worked as which Sleep stages of pre-treatment;
(4) detect best waking up constantly; The sleep cycle enumerator puts 0 when beginning at every turn, and when detecting the sleeper after the entering S sleep stage in paradoxical sleep stage, the sleep cycle enumerator adds 1 automatically; After the sleep cycle enumerator is added to 5, sends to wake module and to wake instruction up.
3. intelligent waken system as claimed in claim 1, its sleep awakening module is characterised in that: based on the live signal receiving circuit that is operated in 470MHZ of CC1100E chip design realization; By the drive circuit that wakes instruction triggers up, after drive circuit receives and wakes instruction up, export faint electric current, after audion amplifies, drive optic coupling element, thereby make quarter-bell or electromagnetic shaker work.
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| CN104267923A (en) * | 2014-09-16 | 2015-01-07 | 惠州Tcl移动通信有限公司 | Music awakening method and mobile device |
| CN105476631A (en) * | 2015-11-25 | 2016-04-13 | 华南理工大学 | EEG (electroencephalogram) based sleep detection and sleep aid method and device |
| CN105999508A (en) * | 2016-04-29 | 2016-10-12 | 厦门中联智创科技有限公司 | Intelligent awaking method based on brain wave analysis |
| CN106163391A (en) * | 2014-01-27 | 2016-11-23 | 因泰利临床有限责任公司 | System for multiphase sleep management, method for the operation thereof, device for sleep analysis, method for classifying a current sleep phase, and use of the system and the device in multiphase sleep management |
| WO2017128539A1 (en) * | 2016-01-29 | 2017-08-03 | 宇龙计算机通信科技(深圳)有限公司 | Alarm control method and alarm control device for use in wearable device |
| CN107635616A (en) * | 2016-05-08 | 2018-01-26 | 深圳市欸阿技术有限公司 | The control method and device of human body wakeup time |
| CN107929912A (en) * | 2017-12-11 | 2018-04-20 | 绵眠（上海）智能科技有限公司 | A kind of eye light awakening method based on brain electricity |
| CN110811554A (en) * | 2019-11-08 | 2020-02-21 | 安徽泰德电子科技有限公司 | Sleep monitor and control system thereof |
| CN112891703A (en) * | 2021-01-15 | 2021-06-04 | 褚明礼 | Auxiliary awakening method and device based on electroencephalogram information |
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| CN112891703A (en) * | 2021-01-15 | 2021-06-04 | 褚明礼 | Auxiliary awakening method and device based on electroencephalogram information |
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Application publication date: 20120919 |